Then enter the income you did get and you can enter all your expenses.  You don't have to get an actual 1099Misc.  

Fill out Schedule C here
The Business Tab - Continue
I'll choose what I work on
Business Income and Expenses
Then….
Profit or Loss from Business, click Start or Update

You use your own name and ssn or business name and EIN if you have one.   You should say you use the Cash Accounting Method and all  income is At Risk.  After you put in your income and expenses  if your net profit is $400 or more you will pay 15.3%  Self Employment tax in addition to your regular income tax.  The Schedule SE will be automatically filled out for it.

After it asks if you received any 1099Misc it will ask if you had any income not reported on a 1099Misc. You should be keeping your own records.  Just go through the interview and answer the questions.   Then you will enter your expenses.